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Square Enix Mobile was a program of Square Enix focused on interactive games for second-generation (2G) and early third-generation (3G) cellular devices.

Operating largely in the Japanese market, the Final Fantasy Mobile initiative was notable for bringing early Final Fantasy series titles to "feature phones", devices regarded as an interim step between basic phones and today's smart devices that were popular during the mid-to-late 2000s, before the BlackBerry, iOS and Android rose to prominence. Of this catalogue, two spin-off titles were released in the West through a partnership with US carrier Verizon Wireless.

Several titles were developed and maintained under the Final Fantasy Mobile brand, including several Japan-exclusive spin-offs of larger titles in the series. A small number of games was eventually ported forward to later smartphones; given this, and the natural evolution of technology over time, Square Enix closed Final Fantasy Mobile on March 31, 2018.